I absolutley love MT .... and I hope to see it come to OSX one day too!
Anyway ... I've downloaded the new 1.4 and discovered that the descriptions for certain MIDI CC messages seem to be off by one number
e.g. CC 115 shows as CC116 in MT .... I've cross checked this with a
controller and host app (drumKAT & Live 5.02)
no big deal but could be confusing to some ...

ndeed, this may be confusing, but indeed the problem is different conventions: some programs display controllers in the range from 0..127 (the native format), and some map them to controllers 1..128, i.e. offsetting each by one so that the first controller has number one.

I choose to support the latter convention in MT, though you're right that it can and will support people who are used to the other convention. I should add an option to do the offset or not.